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My LS6 Flow Numbers
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SMOKEmUP
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1979 Chevrolet Camaro

PostPosted: Thu Jul 06, 2006 9:56 am    Post subject: My LS6 Flow Numbers Reply with quote

I posted this in the previous LS6 post but it's buried so I decided to post it separately.

The heads were ported by TEA, Total Engine Airflow. The are known for porting Ford heads but jumped into the LSx market.

Below are the flow numbers, this is on a 3.90" bore.

Flow numbers

Lift ..... Intake ..... Exhaust
.100"..... 66.6....... 50.5
.200"..... 137.7..... 116.8
.300"..... 215.1..... 165.6
.400"..... 258.3..... 226.3
.500"..... 300.1........ 246.2
.550"..... 312.0..... 251.4
.600"..... 320.2..... 256.6



Comparing flow numbers from one bench to another bench isn't an apples to apples comparison. Here is what the new AFR heads flow as test by TEA (same bench) compared to my heads.

Lift............AFR 205...........AFR 225...........My TEA's
.100............64...................68........... ......66.6
.200............140.................149........... ......137.7
.300............203.................220........... ......215.1
.400............250.................269........... ......258.3
.500............282.................306........... ......300.1
.550............296.................315........... ......312.0
.600............303.................305........... ......320.2

My heads are using stock LS6 hollow stem valves. The cam I'll be installing is 0.550" lift. Based on my stock cam and heads they are flowing about 220 cfm intake and 170 cfm exhaust. Flow with the new heads and cam is 312 cfm intake, 251 cfm exhaust, a gain of +92 cfm intake, +81 cfm exhaust. Should be a very healthy gain.


The only thing I need to do is cc the combustion chambers so I can properly select the correct size head gasket. "Paul P" when can I come by to cc these puppies?


Last edited by SMOKEmUP on Thu Jul 06, 2006 5:39 pm; edited 1 time in total
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jeep_406
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PostPosted: Thu Jul 06, 2006 11:55 am    Post subject: Reply with quote

Big numbers. Shocked Can't wait to see how much difference the cam and heads make. When do you think you'll have it together?
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SMOKEmUP
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1979 Chevrolet Camaro

PostPosted: Thu Jul 06, 2006 12:28 pm    Post subject: Reply with quote

Those are some healthy flow numbers Mr. Green . The limiting factors are going to be the intake manifold and exhaust. For now they are going to remain as they are since the financial gods are against me, maybe Santa will be good to me. Wink

I'm hoping to get them on as soon as I can. I want to double check the chamber volume before I order the head gaskets, it will be on the hairy edge of running on 93 octane gas as it is and I don't want to mess it up. I pinged Paul_P and he has the stuff to cc the heads so I was planning on swinging by his place soon. Once that's done I can order the head gaskets and bolt everything together. I may have to order different length pushrods as well since the heads were milled 0.020" and the LS6 valves are 6 mm longer than the LS1's, the mystery here is the base circle of the cam (not sure if that's changed at all). Therefore I plan to put it together and measure it then order what I need, if you're wondering stock pushrod length is 7.4". So my best guess is 2 weeks.
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Paul P
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PostPosted: Thu Jul 06, 2006 4:34 pm    Post subject: Reply with quote

Smoke,
Tonight is ok come on by. I have the 10cc burrett and the 6"x6" Polycarb plate with a hole in it ready to do the job. It should be a piece of cake. I probably have some cake left over from party too. Big Grin
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SMOKEmUP
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1979 Chevrolet Camaro

PostPosted: Thu Jul 06, 2006 5:37 pm    Post subject: Reply with quote

Paul P wrote:
Smoke,
Tonight is ok come on by. I have the 10cc burrett and the 6"x6" Polycarb plate with a hole in it ready to do the job. It should be a piece of cake. I probably have some cake left over from party too. Big Grin

What, no beers?
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SMOKEmUP
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1979 Chevrolet Camaro

PostPosted: Fri Jul 07, 2006 8:17 am    Post subject: Reply with quote

Went by Paul P's last night and cc'd the heads. Now I'm really wishing I did a before cc'ing.

The numbers are
Chamber: 64.45 cc
Intake Port: 230 cc
Exhaust Port: 80 cc

The intake port size I was told would be about 215cc, not 230. They probably told me that just to get the job since everybody is all about small ports with big flow numbers. I'm happy with the exhaust port size which should work great.

The chamber volume is the one that has me scratching my head. The LS6 heads are suppose to have 64.5 cc chamber volume factory. I had the heads milled 0.020" to achieve a chamber volume of 63 cc. So did they mill the heads? They were also suppose to CNC the chambers and they weren't touched.

Regardless of these issues the heads appear to be very nice and the repeatability from one cylinder to the next is spot on. Gotta love CNC's.

Code:

 Bore 3.898 (inches)
Stroke 3.622 (inches)
Rod Length 6.098 (inches)
Cyl. Head Vol. 64.45 (cc)
Deck Height -0.008 (inches)
Head Gasket Bore 3.91 (inches)
Head Gasket Thickness 0.045 (inches)
Piston to Cyl. Wall Clearance 0.003 (inches)
Top Ring Land Height 0.2 (inches)
Piston Dome Vol. 0 (cc)

Compression Ratio:
10.868 : 1

Displacement:
345.8(ci), 5.7 (liters)

DCR (IVC is approx. 67.5 degrees ABDC)
67   8.495 : 1
68   8.425 : 1
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af2
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1933 Willys Coupe

PostPosted: Fri Jul 07, 2006 7:54 pm    Post subject: Reply with quote

Smoke I have a question. I would like the heads I bought to flow 320 and 220@ .600. Do you think the company is good enough to send the heads to them? I won't hold you to it PM me if you want. The heads I bought flow 304 and close to 200 so they say. Being they are CNC'd they are probably close. The wife won't find out until Sunday when she does the bills Shocked Adam
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Rick 5150 69
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PostPosted: Fri Jul 07, 2006 9:02 pm    Post subject: Reply with quote

Quote:
The wife won't find out until Sunday when she does the bills. Adam


Theres trouble brewing!!! Rolling Eyes
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SMOKEmUP
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1979 Chevrolet Camaro

PostPosted: Fri Jul 07, 2006 11:05 pm    Post subject: Reply with quote

af2 wrote:
Smoke I have a question. I would like the heads I bought to flow 320 and 220@ .600. Do you think the company is good enough to send the heads to them? I won't hold you to it PM me if you want. The heads I bought flow 304 and close to 200 so they say. Being they are CNC'd they are probably close. The wife won't find out until Sunday when she does the bills Shocked Adam

TEA has a great reputation. A lot of Mustang guys swear by them. TEA is also big in the LS1 market and are considered one of the permier porters for the LS1 heads. They are now working with Trick Flow and designed the ports and will be CNC'ing all the new Trick Flow LS1 heads.

Not sure what they can do with the heads you have. I would give them a call and see what they say. My concerns are since the heads are already CNC ported their program might not be able to correct someone else's.
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af2
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PostPosted: Sat Jul 08, 2006 10:05 pm    Post subject: Reply with quote

Rick 5150 69 wrote:
Quote:
The wife won't find out until Sunday when she does the bills. Adam


Theres trouble brewing!!! Rolling Eyes


I told her and didn't know she already knew Shocked Smoke you have a point I never thought about and have to consider when I get the things.
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af2
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PostPosted: Sat Jul 08, 2006 11:20 pm    Post subject: Reply with quote

Rick 5150 69 wrote:
Quote:
The wife won't find out until Sunday when she does the bills. Adam


Theres trouble brewing!!! Rolling Eyes


If you have room I will buy a room to stay in Shocked Just kidding, the wife is more excited than me about the car. Had to Edit Because the heads only need the final porting to make them right!
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PostPosted: Thu Jul 20, 2006 4:13 pm    Post subject: Reply with quote

Just wanted to post some pictures.


PA200208.JPG
 Description:
Intake ports

Download
 Filename:  PA200208.JPG
 Filesize:  553.8 KB
 Downloaded:  1421 Time(s)


PA200207.JPG
 Description:
Intake port

Download
 Filename:  PA200207.JPG
 Filesize:  523.66 KB
 Downloaded:  1400 Time(s)


PA200206.JPG
 Description:
Overall head / chambers

Download
 Filename:  PA200206.JPG
 Filesize:  544.14 KB
 Downloaded:  1446 Time(s)

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SMOKEmUP
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PostPosted: Sat Jul 22, 2006 12:26 am    Post subject: Reply with quote

Parts are on order should be here middle next week.
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zo6vetteman2003
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PostPosted: Sun Nov 05, 2006 7:41 pm    Post subject: Re: My LS6 Flow Numbers Reply with quote

smokemup wrote:
I posted this in the previous LS6 post but it's buried so I decided to post it separately.

The heads were ported by TEA, Total Engine Airflow. The are known for porting Ford heads but jumped into the LSx market.

Below are the flow numbers, this is on a 3.90" bore.

Flow numbers

Lift ..... Intake ..... Exhaust
.100"..... 66.6....... 50.5
.200"..... 137.7..... 116.8
.300"..... 215.1..... 165.6
.400"..... 258.3..... 226.3
.500"..... 300.1........ 246.2
.550"..... 312.0..... 251.4
.600"..... 320.2..... 256.6



Comparing flow numbers from one bench to another bench isn't an apples to apples comparison. Here is what the new AFR heads flow as test by TEA (same bench) compared to my heads.

Lift............AFR 205...........AFR 225...........My TEA's
.100............64...................68........... ......66.6
.200............140.................149........... ......137.7
.300............203.................220........... ......215.1
.400............250.................269........... ......258.3
.500............282.................306........... ......300.1
.550............296.................315........... ......312.0
.600............303.................305........... ......320.2

Big flow numbers for sure. RHS says .006" of flat milling per 1 cc reduction on the combustion chambers on 243 heads.

_________________
03' Corvette ZO6, Vararam Widemouth intake, Carbon Fiber Powerduct, LSX FAST 90 Intake and Ported and Polished LS2 90mm throttlebody, 36# Fuel injectors, Kooks 1-7/8" LT's 3" X pipe, Borla Stingers, Comp Cam XR281HR (228/230 Dura.) 112 degree lsa. Stage 1 215cc/80cc 62cc combustion chamber LS6 heads ported and polished to Stage 2. Crane 1.8 Gold Race Rockers. Nitto 555RII's, SPEC Stage 3+ clutch.
Tuning by Slowhawk DEZ Racing Seekonk, Ma.
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SMOKEmUP
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1979 Chevrolet Camaro

PostPosted: Mon Nov 06, 2006 10:06 am    Post subject: Re: My LS6 Flow Numbers Reply with quote

zo6vetteman2003 wrote:

Big flow numbers for sure. RHS says .006" of flat milling per 1 cc reduction on the combustion chambers on 243 heads.


I cc'd the ports myself after they came back from TEA.

The numbers are after a 0.020" mill and CNC work on 243 heads:
Chamber: 64.45 cc
Intake Port: 230 cc
Exhaust Port: 80 cc
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